Carbureter.



I B. N. PIERCE.

GARBURETER.

APPLICATION FILED sEPT. 19, 1907,

Patented J an. 24, 1911.

2 SHEETS-SHEET 1.

lill

n. JR@ H INVENTOR.

Evi/MDX ATTORNEY.

IIIII I! WI TNESSES B. N. PIERCE.

GARBUBETER.

APPLICATION FILED s EPT. 19, 1907.

Patentd Jan. 24, 1911.

2 SHEETS-SHEET n.

INVENTOR. MM 624.6..

WITNESSES;

7i @ZM ATTORNEY.

' of Indianapolis,

BURT NEULON PIERCE, OF INDIANAPOLIS, INDIANA.

Patented aan. 24, iaii.

CRBUBETER.

982,297., Speoication of Letters Patent.

Application filed` September 19, 1907. Serial No. 393,628.

To all whom it may concem:

Be it known that l, BUn'r NEULoN PIERCE,

of Indiana, have invented a certain new and useful Carbureter'; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had'to the accompanying drawings, in which like letters refer to like parts.

The object of this invent-ion is to improve the construction of carbureters for combustion engines.

@ne feature consists in the means substantially set forth herein for regulating the operation of carbureters by controlling the exit therefrom of the gas. This controlling means is so arranged that it shuts of toward the last or opens up in the begin ning with a very gradual change. This permits the carbureter. to be regulated with great nicety and exactness and enables the engine to be started or stopped very slowly,

'gradually and noiselessly.

Another feature of the invention consists in providing a chamber of limited capacityl for holding a fair priming charge and in the construction substantially as shown for the air taking up gasolene or fuel entering the`carbureter and this prevents'any exces sive accumulation therein of the fuel or any waste thereof. This is accomplished by means for bringing in the air all around the oint of introduction of gasolene or fue] int-o the carhureter.

Another feature of the. invention consists in providing a readily adjustable means for directing theair inlet toward the heated portion ,of the engine with which the carbureter L may t@ less.

be combined so that the air `coming into the carbnreter may be heated more or feature of my invent-ion consists Another in 'various means herein set forth for the accomte adjustment and regulation of dierent rts of `the carburetor.

.The `Ecritures of hilly u ff-w dlrawings and the c l is a side elevation 'lof thecarbureter with the 'adjustable outlet end in the my invention will be more from the accompanying following description and horizontal m-:1 Fig. 2 is a central ver til section throughnthe same with the adjustalole outlet end changed from the horiaontal to the vertical position. Fig. 3 is a county of Marion, and State section on the line 33 of Fig. 2. Fig. 4 is an end elevation' of Fig. 1 with the air inlet portion turned from a vertical to a horizontal posit-ion. Fig. 5 is a plan view with the outlet end and to plate removed and parts broken away to s ow the throttle valve construction, the valve being in its en an air inlet member is a justably mounted,

consisting of the portions 12 and 13 extending at a right angle toeach other and secured together. The portion 12 carries some set screws 14 engaging the air inlet end 1l in the external annular groove 15, see Fig. 1,. This construction is such that said air inlet member may be turned so that the inlet end' thereof will oint in any desired direction. The object o this feature of the invention is to enable this air inlet member to be turned towardv the heated portion of the engine when the carbureter is mounted in place and this enables the carburetor to get a sup-` ply of warm air from the body of air around 'the heated portion of the engine. The value of this improvement is obvious as the heated air more readily mixes with the gasolene or fuel and forms a more perfect and cornbustible gas. y

ln the inlet portion ci the shell there is a partitionl 2O with an inlet lopening 21 for the admission of air to the mixing chamber .22. This opening 21 is controlled by the air inlet valve 23 secured on a. tapering sleeve 24 slidably mounted una rod 25 that is secured at one end in the bracket 26 and extends through the slidingbushing 27.` A spring 28 lies bet-Ween the slc ive 24 and the .bushing 27 which is compressed or relaxed by the regulating nut 29 that screws on the rod 25.

The gasolene or fuel enters through the pipe 30 and valve chamber 31 which has a port 32 that is regulatedexternally bythe needle valve 33 ca-rryingon its outer end a nut 133. There is Valso a central vertical port from the casing 31 through which the partition 35 'in the chamber 31 and the per`- forated nut 36. The valve t is' heldin its,

ioo y closed position. by the spring 37. The upper end of thevvalve 34 projects beyond the upper end'of the Valve chamber 31 into engagement with the sleeve 24 of the air inlet valve. Said valve 34 has a reduced portion 38, the lower part of which forms a shoul.- der or valve surface that closes an oblique port 39 through the u per end of the casing 31. Therefore the va ve 34 controls really tw'o fuel ports to chamber 22, the port 39 and the main opening `through which the valve extends. Some fuel passes through the last port because the valve is tapering. The' fuel valve 34 is operated by the sleeve 24 ofthe air inlet. Valve. Under the influence of the suction of the engine the air inlet valve is' moved to the dotted line position shown in Fig. 2. The farther to the right said air inlet valve is moved the greater will be the depression and actuation of the valve 34. The` sleeve24 has an annular recess 40 at the point where it enga es the valve 34. l/Vhen the airinlet valve .24.1s closed the purpose of this is to cause' agr'sidden opening of the fuel valve when th""air inlet valve 'is g secured by screws.

first opened. f

One object of the construction which has been described is to providea considerable 'a chamberf'wiifthin the casing.` 31 that will always be fullgof asolene so', that the gasolene will be'imme iately at thev outlet ports ready to enter the-mixing chamber as soon as said ports are open to any. extent. This gives to the device very quick and responsive laction.-

The false bottom y42 is provided to s urround thevalve bottom '31 below the upper end and catch any asole'ne or fuel overflowing therefrom that is not taken up by the air immediately. It is provided `with openings 43 all around said casing l31 through which air rushes through the chamber 44 from the air inlet. It isobvious-that under the influence of the engines suction sufficient air will be drawn in through the chamber44 and will pass up and immediately surround the casing 31 to immediately and effectively takeV up any gasolene or fuel that may flow down from the upper end of the casing .31. To regulate the passage of air through this by-'pass I provide a swing valve 46, being a plate pivoted at its two ends in the sides of the shell or casing so it willby gravity be normally vertical ybut will swing under the iniuence of passing air. Its movement by the passing air may be limited by theset screw 47 extending through the shell and externally operative. I also provide external operative means for forcibly holding the inlet valve 23 'o en. This consists of a crank rod 50 extending through the portion 11 of the shell and mounted in two arms 51 and 52 from the bracket 26. The lowerl end of this crank rod 50 has an arm, as seen in' Fig. .3 that'when turned will engage and plates 60 and 61 is in the form shown in.

five degrees to a central vertical line through the shell and upon it there is an integral plate 60 and upon that a plate 61 is riveted. The outlet opening 62 through these parts or Fig. 5, substantially the same as an artists palette so that it will have a greatly reduced or depressed end. Between these two plates 60 and 61 a throttle valve 64 in the frame of the plate is mounted on a shaft 65 that is actuated by the throttle lever 66. The body of this throttle valve is substantially the same in shape as the gas outlet port 62 so that as said valve closes the outlet portwill very radually be reduced as indicated by dottecI lines inFig. 6 until the valve reaches the-point of the port. Likewise, the opening of this port will be gradually increased.

Upon the plate 61 the outlet member 67 is Its inner end is beveled at an angle of 45 degrees from a horizontal plane so that said member 67 may extend horizontally or vertically or in other direcing from the wider tions -to make it easy to mount the carbureter in connectionV with any particular engine.

A waste outlet 68 is provided in the bottom ef the carbureter to -limit the ca acity of the chamber 44 sol that the aecumu ation therein will never be excessive but will be vsufficient to constitute a fair priming charge.

This is an important feature lof the invention, as it constantly supplies the device with outlet opening that is substantially the same inshape as an artists-palette, andI a throttle valve adapted to close said opening by movportion to the narrow portion thereof.

2. A carbureter including a shell with a main air inlet port, a valve casing extending upward into* said shell -with a portin the up er end. thereoffor admitting the fuel, a false bottom for the shell through which said valve casing extends with openings in the false bottom around the valve casing,

and a by-pass 4leading from the air inlet;

opening in'said shelll to theopenings around said valve casing.

3.. A carbureteri-including'a shell with a main inlet port, a valve casing extending upward into said shell with a port in the vupper end thereof for admitting the fuel, a

false bottom for the shell through which said valve casing extends with openings 'in the false bottom around the valve casing, a

ofports for the admission of fuel, a valve for controlling one of said ports, an air inletvalve, means controlled bv said air inlet' valve for controlling said .fuel inlet valve, and an externally operative valve for con- -trolling the other fuel inlet port.

A `carbureter including a shell with an air. inlet port, a spring-pressed valve for closiiig it, a tapering sleeve extending from said valve reduced eircumferentially at oneI oint, a valve easing extending upward into said shell blow said sleeve with an outlet port therein for the fuel, a spring-pressed valve'for closing said port the upper end of which normally engages the reduced portion .i

of said sleeve, whereby thel initial movement of said inlet valve will cause a, positive and sudden movement lat the same time' ofv said fuel inlet valve.

' 6. 'A carbureter including a shell, a valve casing ezitendinginto the same with a central port in the upper end thereof for the outlet of fuel, an inclined port leading from -the lower portion of said central port, and a valve for closing said ports which extends through said lcentral port and is reduced cireumferentially in vthe portion ythereof extending through said central port, substantially as set forth.

lIn Witness whereof, lIhave hereunto affixed my signature in the presence of the Witnesses herein named.

BURT NEULON PIERCE. Witnesses:

Onivn BREEDEN, N. ALLEMONG 

